William Blair & Company
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William Blair & Company’s ProShares Ultra Semiconductors USD Stock Holding History

William Blair & Company’s Portfolio USD Stock Details USD Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.8M Sell
58,407
-1,875
-3% -$102K 0.01% 647
2025
Q4 		$3.17M Sell
60,282
-220
-0.4% -$11.7K 0.01% 624
2025
Q3 		$3M Sell
60,502
-50
-0.1% -$2.16K 0.01% 633
2025
Q2 		$2.24M Sell
60,552
-40
-0.1% -$1K 0.01% 692
2025
Q1 		$1.22M Sell
60,592
-1,120
-2% -$32.1K ﹤0.01% 831
2024
Q4 		$2.01M Buy
61,712
+72
+0.1% +$2.39K 0.01% 711
2024
Q3 		$1.85M Sell
61,640
-400
-0.6% -$12K 0.01% 731
2024
Q2 		$2.16M Sell
62,040
-260
-0.4% -$7.13K 0.01% 668
2024
Q1 		$1.54M Sell
62,300
-2,400
-4% -$46.8K ﹤0.01% 748
2023
Q4 		$880K Sell
64,700
-200
-0.3% -$2.18K ﹤0.01% 895
2023
Q3 		$625K Hold
64,900
– – ﹤0.01% 984
2023
Q2 		$685K Sell
64,900
-9,900
-13% -$79.3K ﹤0.01% 961
2023
Q1 		$541K Hold
74,800
– – ﹤0.01% 1020
2022
Q4 		$310K Hold
74,800
– – ﹤0.01% 1219
2022
Q3 		$268K Hold
74,800
– – ﹤0.01% 1275
2022
Q2 		$355K Hold
74,800
– – ﹤0.01% 1201
2022
Q1 		$747K Hold
74,800
– – ﹤0.01% 1023
2021
Q4 		$988K Hold
74,800
– – ﹤0.01% 964
2021
Q3 		$640K Hold
74,800
– – ﹤0.01% 1069
2021
Q2 		$676K Hold
74,800
– – ﹤0.01% 1053
2021
Q1 		$560K Hold
74,800
– – ﹤0.01% 1080
2020
Q4 		$484K Hold
74,800
– – ﹤0.01% 1092
2020
Q3 		$356K Hold
74,800
– – ﹤0.01% 1071
2020
Q2 		$283K Sell
74,800
-3,200
-4% -$10.2K ﹤0.01% 1118
2020
Q1 		$187K Sell
78,000
-62,000
-44% -$217K ﹤0.01% 1183
2019
Q4 		$540K Sell
140,000
-5,200
-4% -$17.2K ﹤0.01% 958
2019
Q3 		$408K Hold
145,200
– – ﹤0.01% 1012
2019
Q2 		$375K Hold
145,200
– – ﹤0.01% 1076
2019
Q1 		$378K Buy
145,200
+4,800
+3% +$11K ﹤0.01% 1059
2018
Q4 		$260K Hold
140,400
– – ﹤0.01% 1136
2018
Q3 		$394K Hold
140,400
– – ﹤0.01% 1040
2018
Q2 		$380K Hold
140,400
– – ﹤0.01% 1033
2018
Q1 		$393K Sell
140,400
-22,800
-14% -$65.1K ﹤0.01% 1002
2017
Q4 		$416K Buy
163,200
+61,200
+60% +$154K ﹤0.01% 1024
2017
Q3 		$216K Buy
+102,000
New +$191K ﹤0.01% 1223
2014
Q4 		– Sell
-268,800
Closed -$232K – 2149
2014
Q3 		$232K Hold
268,800
– – ﹤0.01% 1922
2014
Q2 		$213K Buy
+268,800
New +$180K ﹤0.01% 1930

Other funds holding USD

IWC
Integrated Wealth Concepts Waltham, Massachusetts $12.5B AUM 18.49% 1-Year Est. Return
DQRIM
Dale Q Rice Investment Management Vancouver, Washington $132M AUM 45.8% 1-Year Est. Return
Mariner
Mariner Overland Park, Kansas $85.7B AUM 24.21% 1-Year Est. Return
DF
Dedeker Financial St. Louis Park, Minnesota $115M AUM
TRCT
Tower Research Capital (TRC) New York $3.85B AUM 32.11% 1-Year Est. Return
RPCONE
Retirement Planning Company of New England Warwick, Rhode Island $246M AUM 27.83% 1-Year Est. Return
HIP
HUB Investment Partners Austin, Texas $4.18B AUM 24.76% 1-Year Est. Return
AWM
Avaii Wealth Management Appleton, Wisconsin $287M AUM 29.75% 1-Year Est. Return
QCM
Quantinno Capital Management New York $59.9B AUM 28.07% 1-Year Est. Return
BMC
Beaton Management Company Haverhill, Massachusetts $225M AUM 26.79% 1-Year Est. Return

William Blair & Company's USD Position: Q1 2026 in Review

William Blair & Company reduced its ProShares Ultra Semiconductors (USD) stake by 3.1% in Q1 2026, selling an estimated $102K and leaving 58,407 shares worth $2.8M. The position accounts for 0.01% of the portfolio, ranked #647.

William Blair & Company first reported a position in USD in Q2 2014 and has held it in 37 quarters since. The position peaked at $3.17M in Q4 2025. 56 funds tracked by Wall St. Rank hold USD as of Q1 2026.

  • William Blair & Company held 58,407 shares of ProShares Ultra Semiconductors worth $2.8M as of Q1 2026.
  • William Blair & Company sold 1,875 ProShares Ultra Semiconductors shares in Q1 2026, an estimated $102K.
  • ProShares Ultra Semiconductors made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #647 holding.
  • William Blair & Company first reported a position in ProShares Ultra Semiconductors in Q2 2014 and has held it in 37 quarters since.
  • William Blair & Company's ProShares Ultra Semiconductors position peaked at $3.17M in Q4 2025.
  • 56 funds tracked by Wall St. Rank held ProShares Ultra Semiconductors as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.